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Toshiba GD-1221, GD-1220 service manual Line monitor circuit, FAX board

Models: GD-1220 GD-1221

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Page 72

4.2.6Line monitor circuit

NA/TW models

NCU board

					RLY2						IC51
					CML relay			R67	R71		Analog
											switch
					8	T1				3	1			IC53
		4	Lb	9	0						0	4	1	2	1
					0						0
Line	CN10				1			IC53
	CN10	3	La	4	1			IC53
		3	La	4	0		5	7	R59	1	1			IC52
					0		5	7	R59	1	1			IC52		CN9
										2	0	15	6	7	2
			+12V			AG	6			2	0
			+12V			AG
				1	12										6
															6
								R66		13	1				3
										13	1	14			3
											0	14
											0
								R68			9,11	10
								R68
								Q51
								AG

FAX board

	1	TXOUT1
CN252	2	RXIN1
	6
	3

28,29

[25,26]

IC2

32

[29] MODEM

3

IC9

Analog

switch

13

[4]15

R273

14[R31]

[2]

R272

15[R30]

[5]

R271

12[R29]

[1]

		R270
	1	[R32]
IC10	[12]

R268

Analog 5 [R35]

switch [15]

R267

2[R33]

[14]

12 RING 25

[2][SPKCLK]

9,10 TONESEL 59

11 RING/TONE 23

ATT3DB1 62

CML1 27

SPVOL0 58

SPVOL1 57

SPVOL2 24

CN5

MAIN board

	25	A5		IC53
				IC53

				SoC
CN5	59	152


	23	153
	62	142		IC23
	27	144		IC23
	27	144
	58	151		ASIC
	58	151		ASIC
	57	150
	24	149

Speaker

IC10

4

R266

[R36]

SP+		CN264		1		5		3 3
SP-				2
						SG
						SG

[13] [R37]

11AG

Fig. 4-12

GD-1220/1221	© 2006 - 2008 TOSHIBA TEC CORPORATION All rights reserved
ELECTRICAL CIRCUITS

4 - 12

08/08

Image 72

Toshiba GD-1221, GD-1220 service manual Line monitor circuit, FAX board

Contents

GD-1220/1221 Page Transportation/Installation Important Service Parts for Safety VorsichtContents 2006 2008 Toshiba TEC Corporation All rights reserved FAX Options GD-1220 GD-1221 RemarksSTUDIO165/205 Available STUDIO167/207/237 System firmware versionSpecifications DBm to -8 dBm The setting can be changed by 1 dB Transmission systemEmbedded DBm to 0 dBm Level -55 dBm or lower cannot be detectedDimension width x length Printing area FolioComp Features Specifications and Outline of System 08/08 Accessories and Parts Following accessories and parts come with the FAX unitAccessory Qty Extends the FAX functions when the FAX unit is installed OptionsOption Function Model System List NA/EU/AU/TWADF Radf Units and Components Symbol Name Function Layout of PC BoardsFAX PWA-F-NCU-631LSU-RELATED Functions Recording paper sizeEffective recording area Size Horizontal x Vertical Effective recording areaFor MJD, AUD, ASD, SAD, TWD, and CND models Unit mm inch Inch Feed direction Mm 0.16 inch Effective recording areaSize Horizontal x Vertical Effective recording range 297 x 293 x A4-R 210 x 206 x A5-R 148 x 144 x 257 x 253 xPrint mode Recording paper selection algorithm and print algorithm Recording paper selection algorithmPrint algorithm Reception print flowchart Start Receive FAX Judgment parameterDiscard printing Bit Discard parameterVertical reduction print Similar reduction print RTI For MJD, AUD, ASD, SAD, TWD, CND models ScanningST-R Comp Scanning widthFor MJD, AUD, ASD, SAD, TWD, and CND models Recording paper rangeRecording paper range A4-R Recording paper range LT long Comp long LD long Comp *2 Comp *1Recording paper range A4 long B4 long A3 long Folio Folio *1Error processing Limitations on reception print Order DrawerLSU-RELATED Functions Circuit Connection and Procedure to Change Mode Dial call-up transmission to a telephone circuitYES Standby stateSelection of the communication mode Procedure to select the transmission modeCommunication mode Toshiba original procedure Telephone circuitSignaling System Diagram and Signal Forms Circuit control signalsThis signal can be sent manually Signal form Signal name Signal formCommunication with the binary signals Image signalMode change is possible only for the original set manually ReceiverOnly error frame retransmitted 1 completed 2 completed Frames received Error occurredCED Nsfcsidis CFRMCF Binary signals PIP PINPRI-EOM PRI-MPSWhen this frame is the last frame, X = FCF FIF FCSFormat FCF format of each binary signal Binary signal Format9600 bps, 7200 bps 4800 bps, 2400 bpsTCF 3 V.8/V.34 communication sequence Standard procedure Transmitter Receiver Line closedSignal name Abbreviation Function Remarks Tone signal between Hz and 3,750 Hz in units150 Hz Frequency transmission CapabilityTRN ALTMaintains the synchroniza 7E H Tion Receives an NSF sent fromTransmitter ReceiverImage data Image data are sent. Transmitter Scrambled data frame to beIs completed Encoded image data Turn off Scrambled 1 is sent forShort training Signal PPS-EOPTransmission of one Is completed Informs to disconnect the lineLine closed DIS cannot be recognized DIALING/COMMUNICATION Control DIALING/COMMUNICATION Control DIALING/COMMUNICATION Control DIALING/COMMUNICATION Control FAX Automatic Switching TEL modeFAX mode General functionsDIALING/COMMUNICATION Control Configuration GD-1220/1221Configuration Description of CircuitsEU/AU/AS/C models Line path switching control circuit Signal Name Type Active Description DestinationCML1 ATT3DB1RLY3, IC3 IC3IC5 Line 1 Dial Pulse Generation Signal Q53 Dial pulse generation circuitLine 1 Dial Pulse Generation Signal Line Current Detection Signal IC23 Line Reverse Current Detection Signal IC23Line current detection circuit REVA1Line 1 Current Detection Signal IC23 Current Reverse Line 1 Current Detection IC23 SignalLine 1 CI Detect Signal IC23 CI detection circuitLine 1 CI Detection Signal IC23 Line monitor circuit FAX boardMonitoring signal Ringer/AlarmLine Monitor LOW HighSound volume PC Boards PWA-F-FAX-635 GD-1220PWA-F-FAX-678 GD-1221 PWA-F-NCU-631 NAD, TWD, SAD PWA-F-NCU-631 MJD, AUD, ASD, CND Electrical Circuits Installation Explanation to the UsersInstallation